diff --git a/frappe/database/schema.py b/frappe/database/schema.py
index 724863af95..d7766d15cd 100644
--- a/frappe/database/schema.py
+++ b/frappe/database/schema.py
@@ -29,9 +29,6 @@ class DBTable:
 		# load
 		self.get_columns_from_docfields()
 
-	def __repr__(self):
-		return self.table_name
-
 	def sync(self):
 		if self.is_new():
 			self.create()
@@ -204,9 +201,6 @@ class DbColumn:
 		self.unique = unique
 		self.precision = precision
 
-	def __repr__(self):
-		return self.table.table_name + '_' + self.fieldname + '_(' + self.fieldtype + ')'
-
 	def get_definition(self, with_default=1):
 		column_def = get_definition(self.fieldtype, precision=self.precision, length=self.length)
 
diff --git a/frappe/patches/v12_0/delete_duplicate_indexes.py b/frappe/patches/v12_0/delete_duplicate_indexes.py
index c1c540df22..5ec60971cc 100644
--- a/frappe/patches/v12_0/delete_duplicate_indexes.py
+++ b/frappe/patches/v12_0/delete_duplicate_indexes.py
@@ -4,6 +4,7 @@ import frappe
 # The patch only checks for indexes with UNIQUE constraints
 
 def execute():
+	if frappe.db.db_type != 'mariadb': return
 	all_tables = frappe.db.get_tables()
 
 	final_deletion_map = frappe._dict()